Merge pull request #638 from jbcrail/add-tac-tests

Add tests for tac.

Makefile

@@ -183,6 +183,7 @@ TEST_PROGS  := \
   seq \
   sort \
   split \
+  tac \
   test \
   tr \
   true \

test/fixtures/tac/delimited_primes.expected

@@ -0,0 +1 @@
+9789:83:79:73:71:67:61:59:53:47:43:41:37:31:29:23:19:17:13:11:7:5:3:2:

test/fixtures/tac/delimited_primes.txt

@@ -0,0 +1 @@
+2:3:5:7:11:13:17:19:23:29:31:37:41:43:47:53:59:61:67:71:73:79:83:89:97

test/fixtures/tac/delimited_primes_before.expected

@@ -0,0 +1 @@
+97:89:83:79:73:71:67:61:59:53:47:43:41:37:31:29:23:19:17:13:11:7:5:3:2

test/fixtures/tac/prime_per_line.expected

@@ -0,0 +1,25 @@
+97
+89
+83
+79
+73
+71
+67
+61
+59
+53
+47
+43
+41
+37
+31
+29
+23
+19
+17
+13
+11
+7
+5
+3
+2

test/fixtures/tac/prime_per_line.txt

@@ -0,0 +1,25 @@
+2
+3
+5
+7
+11
+13
+17
+19
+23
+29
+31
+37
+41
+43
+47
+53
+59
+61
+67
+71
+73
+79
+83
+89
+97

test/tac.rs

@@ -0,0 +1,50 @@
+use std::process::Command;
+use util::*;
+
+static PROGNAME: &'static str = "./tac";
+
+#[path = "common/util.rs"]
+#[macro_use]
+mod util;
+
+#[test]
+fn test_stdin_default() {
+    let mut cmd = Command::new(PROGNAME);
+    let result = run_piped_stdin(&mut cmd, "100\n200\n300\n400\n500");
+    assert_eq!(result.stdout, "500400\n300\n200\n100\n");
+}
+
+#[test]
+fn test_stdin_non_newline_separator() {
+    let mut cmd = Command::new(PROGNAME);
+    let result = run_piped_stdin(&mut cmd.args(&["-s", ":"]), "100:200:300:400:500");
+    assert_eq!(result.stdout, "500400:300:200:100:");
+}
+
+#[test]
+fn test_stdin_non_newline_separator_before() {
+    let mut cmd = Command::new(PROGNAME);
+    let result = run_piped_stdin(&mut cmd.args(&["-b", "-s", ":"]), "100:200:300:400:500");
+    assert_eq!(result.stdout, "500:400:300:200:100");
+}
+
+#[test]
+fn test_single_default() {
+    let mut cmd = Command::new(PROGNAME);
+    let result = run(&mut cmd.arg("prime_per_line.txt"));
+    assert_eq!(result.stdout, get_file_contents("prime_per_line.expected"));
+}
+
+#[test]
+fn test_single_non_newline_separator() {
+    let mut cmd = Command::new(PROGNAME);
+    let result = run(&mut cmd.args(&["-s", ":", "delimited_primes.txt"]));
+    assert_eq!(result.stdout, get_file_contents("delimited_primes.expected"));
+}
+
+#[test]
+fn test_single_non_newline_separator_before() {
+    let mut cmd = Command::new(PROGNAME);
+    let result = run(&mut cmd.args(&["-b", "-s", ":", "delimited_primes.txt"]));
+    assert_eq!(result.stdout, get_file_contents("delimited_primes_before.expected"));
+}