mirror of
https://github.com/nushell/nushell
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0569a9c92e
# Description Pretty much all operations/commands in Nushell assume that the column names/keys in a record and thus also in a table (which consists of a list of records) are unique. Access through a string-like cell path should refer to a single column or key/value pair and our output through `table` will only show the last mention of a repeated column name. ```nu [[a a]; [1 2]] ╭─#─┬─a─╮ │ 0 │ 2 │ ╰───┴───╯ ``` While the record parsing already either errors with the `ShellError::ColumnDefinedTwice` or silently overwrites the first occurence with the second occurence, the table literal syntax `[[header columns]; [val1 val2]]` currently still allowed the creation of tables (and internally records with more than one entry with the same name. This is not only confusing, but also breaks some assumptions around how we can efficiently perform operations or in the past lead to outright bugs (e.g. #8431 fixed by #8446). This PR proposes to make this an error. After this change another hole which allowed the construction of records with non-unique column names will be plugged. ## Parts - Fix `SE::ColumnDefinedTwice` error code - Remove previous tests permitting duplicate columns - Deny duplicate column in table literal eval - Deny duplicate column in const eval - Deny duplicate column in `from nuon` # User-Facing Changes `[[a a]; [1 2]]` will now return an error: ``` Error: nu:🐚:column_defined_twice × Record field or table column used twice ╭─[entry #2:1:1] 1 │ [[a a]; [1 2]] · ┬ ┬ · │ ╰── field redefined here · ╰── field first defined here ╰──── ``` this may under rare circumstances block code from evaluating. Furthermore this makes some NUON files invalid if they previously contained tables with repeated column names. # Tests + Formatting Added tests for each of the different evaluation paths that materialize tables.
365 lines
9.1 KiB
Rust
365 lines
9.1 KiB
Rust
use nu_test_support::nu;
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use pretty_assertions::assert_eq;
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use rstest::rstest;
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const MODULE_SETUP: &str = r#"
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module spam {
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export const X = 'x'
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export module eggs {
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export const E = 'e'
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export module bacon {
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export const viking = 'eats'
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export module none {}
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}
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}
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}
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"#;
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#[test]
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fn const_bool() {
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let inp = &["const x = false", "$x"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "false");
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}
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#[test]
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fn const_int() {
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let inp = &["const x = 10", "$x"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "10");
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}
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#[test]
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fn const_float() {
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let inp = &["const x = 1.234", "$x"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "1.234");
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}
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#[test]
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fn const_binary() {
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let inp = &["const x = 0x[12]", "$x"];
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let actual = nu!(&inp.join("; "));
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assert!(actual.out.contains("12"));
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}
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#[test]
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fn const_datetime() {
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let inp = &["const x = 2021-02-27T13:55:40+00:00", "$x"];
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let actual = nu!(&inp.join("; "));
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assert!(actual.out.contains("Sat, 27 Feb 2021 13:55:40"));
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}
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#[test]
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fn const_list() {
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let inp = &["const x = [ a b c ]", "$x | describe"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "list<string>");
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}
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#[test]
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fn const_record() {
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let inp = &["const x = { a: 10, b: 20, c: 30 }", "$x | describe"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "record<a: int, b: int, c: int>");
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}
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#[test]
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fn const_table() {
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let inp = &[
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"const x = [[a b c]; [10 20 30] [100 200 300]]",
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"$x | describe",
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];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "table<a: int, b: int, c: int>");
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}
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#[test]
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fn const_invalid_table() {
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let inp = &["const x = [[a b a]; [10 20 30] [100 200 300]]"];
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let actual = nu!(&inp.join("; "));
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assert!(actual.err.contains("column_defined_twice"));
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}
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#[test]
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fn const_string() {
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let inp = &[r#"const x = "abc""#, "$x"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "abc");
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}
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#[test]
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fn const_nothing() {
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let inp = &["const x = null", "$x | describe"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "nothing");
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}
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#[rstest]
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#[case(&["const x = not false", "$x"], "true")]
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#[case(&["const x = false", "const y = not $x", "$y"], "true")]
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#[case(&["const x = not false", "const y = not $x", "$y"], "false")]
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fn const_unary_operator(#[case] inp: &[&str], #[case] expect: &str) {
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, expect);
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}
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#[rstest]
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#[case(&["const x = 1 + 2", "$x"], "3")]
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#[case(&["const x = 1 * 2", "$x"], "2")]
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#[case(&["const x = 4 / 2", "$x"], "2")]
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#[case(&["const x = 4 mod 3", "$x"], "1")]
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#[case(&["const x = 5.0 / 2.0", "$x"], "2.5")]
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#[case(&[r#"const x = "a" + "b" "#, "$x"], "ab")]
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#[case(&[r#"const x = "a" ++ "b" "#, "$x"], "ab")]
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#[case(&[r#"const x = [1,2] ++ [3]"#, "$x | describe"], "list<int>")]
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#[case(&[r#"const x = 0x[1,2] ++ 0x[3]"#, "$x | describe"], "binary")]
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#[case(&[r#"const x = 0x[1,2] ++ [3]"#, "$x | describe"], "list<any>")]
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#[case(&["const x = 1 < 2", "$x"], "true")]
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#[case(&["const x = (3 * 200) > (2 * 100)", "$x"], "true")]
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#[case(&["const x = (3 * 200) < (2 * 100)", "$x"], "false")]
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#[case(&["const x = (3 * 200) == (2 * 300)", "$x"], "true")]
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fn const_binary_operator(#[case] inp: &[&str], #[case] expect: &str) {
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, expect);
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}
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#[rstest]
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#[case(&["const x = 1 / 0", "$x"], "division by zero")]
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#[case(&["const x = 10 ** 10000000", "$x"], "pow operation overflowed")]
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#[case(&["const x = 2 ** 62 * 2", "$x"], "multiply operation overflowed")]
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#[case(&["const x = 1 ++ 0", "$x"], "doesn't support this value")]
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fn const_operator_error(#[case] inp: &[&str], #[case] expect: &str) {
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let actual = nu!(&inp.join("; "));
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assert!(actual.err.contains(expect));
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}
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#[rstest]
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#[case(&["const x = (1..3)", "$x | math sum"], "6")]
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#[case(&["const x = (1..3)", "$x | describe"], "range")]
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fn const_range(#[case] inp: &[&str], #[case] expect: &str) {
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, expect);
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}
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#[test]
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fn const_subexpression_supported() {
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let inp = &["const x = ('spam')", "$x"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "spam");
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}
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#[test]
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fn const_command_supported() {
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let inp = &["const x = ('spam' | str length)", "$x"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "4");
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}
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#[test]
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fn const_command_unsupported() {
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let inp = &["const x = (loop { break })"];
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let actual = nu!(&inp.join("; "));
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assert!(actual.err.contains("not_a_const_command"));
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}
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#[test]
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fn const_in_scope() {
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let inp = &["do { const x = 'x'; $x }"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "x");
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}
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#[test]
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fn not_a_const_help() {
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let actual = nu!("const x = ('abc' | str length -h)");
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assert!(actual.err.contains("not_a_const_help"));
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}
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#[test]
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fn complex_const_export() {
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let inp = &[MODULE_SETUP, "use spam", "$spam.X"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "x");
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let inp = &[MODULE_SETUP, "use spam", "$spam.eggs.E"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "e");
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let inp = &[MODULE_SETUP, "use spam", "$spam.eggs.bacon.viking"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "eats");
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let inp = &[
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MODULE_SETUP,
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"use spam",
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"($spam.eggs.bacon.none | is-empty)",
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];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "true");
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}
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#[test]
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fn complex_const_glob_export() {
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let inp = &[MODULE_SETUP, "use spam *", "$X"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "x");
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let inp = &[MODULE_SETUP, "use spam *", "$eggs.E"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "e");
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let inp = &[MODULE_SETUP, "use spam *", "$eggs.bacon.viking"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "eats");
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let inp = &[MODULE_SETUP, "use spam *", "($eggs.bacon.none | is-empty)"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "true");
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}
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#[test]
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fn complex_const_drill_export() {
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let inp = &[
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MODULE_SETUP,
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"use spam eggs bacon none",
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"($none | is-empty)",
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];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "true");
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}
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#[test]
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fn complex_const_list_export() {
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let inp = &[
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MODULE_SETUP,
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"use spam [X eggs]",
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"[$X $eggs.E] | str join ''",
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];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "xe");
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}
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#[test]
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fn exported_const_is_const() {
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let module1 = "module foo {
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export def main [] { 'foo' }
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}";
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let module2 = "module spam {
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export const MOD_NAME = 'foo'
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}";
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let inp = &[module1, module2, "use spam", "use $spam.MOD_NAME", "foo"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "foo");
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}
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#[test]
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fn const_captures_work() {
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let module = "module spam {
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export const X = 'x'
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const Y = 'y'
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export-env { $env.SPAM = $X + $Y }
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export def main [] { $X + $Y }
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}";
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let inp = &[module, "use spam", "$env.SPAM"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "xy");
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let inp = &[module, "use spam", "spam"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "xy");
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}
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#[ignore = "TODO: Need to fix `overlay hide` to hide the constants brough by `overlay use`"]
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#[test]
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fn complex_const_overlay_use_hide() {
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let inp = &[MODULE_SETUP, "overlay use spam", "$X"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "x");
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let inp = &[MODULE_SETUP, "overlay use spam", "$eggs.E"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "e");
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let inp = &[MODULE_SETUP, "overlay use spam", "$eggs.bacon.viking"];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "eats");
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let inp = &[
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MODULE_SETUP,
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"overlay use spam",
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"($eggs.bacon.none | is-empty)",
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];
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let actual = nu!(&inp.join("; "));
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assert_eq!(actual.out, "true");
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let inp = &[MODULE_SETUP, "overlay use spam", "overlay hide", "$eggs"];
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let actual = nu!(&inp.join("; "));
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assert!(actual.err.contains("nu::parser::variable_not_found"));
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}
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// const implementations of commands without dedicated tests
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#[test]
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fn describe_const() {
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let actual = nu!("const x = ('abc' | describe); $x");
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assert_eq!(actual.out, "string");
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}
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#[test]
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fn ignore_const() {
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let actual = nu!(r#"const x = ("spam" | ignore); $x == null"#);
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assert_eq!(actual.out, "true");
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}
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#[test]
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fn version_const() {
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let actual = nu!("const x = (version); $x");
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assert!(actual.err.is_empty());
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}
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#[test]
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fn if_const() {
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let actual = nu!("const x = (if 2 < 3 { 'yes!' }); $x");
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assert_eq!(actual.out, "yes!");
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let actual = nu!("const x = (if 5 < 3 { 'yes!' } else { 'no!' }); $x");
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assert_eq!(actual.out, "no!");
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let actual =
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nu!("const x = (if 5 < 3 { 'yes!' } else if 4 < 5 { 'no!' } else { 'okay!' }); $x");
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assert_eq!(actual.out, "no!");
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}
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