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If there were no variable substitutions in a command, then initial assignments would be misinterpreted as commands, instead of being skipped over. This is demonstrated by the following example: => foo=bar echo baz Unknown command 'foo=bar' - try 'help' Signed-off-by: Sean Anderson <seanga2@gmail.com>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Tests for echo command
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*
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* Copyright 2020, Heinrich Schuchadt <xypron.glpk@gmx.de>
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/global_data.h>
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#include <display_options.h>
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#include <test/lib.h>
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#include <test/test.h>
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#include <test/ut.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct test_data {
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char *cmd;
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char *expected;
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};
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static struct test_data echo_data[] = {
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{"echo 1 2 3",
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"1 2 3"},
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/* Test new line handling */
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{"echo -n 1 2 3; echo a b c",
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"1 2 3a b c"},
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/*
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* Test handling of environment variables.
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*
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* j, q, x are among the least frequent letters in English.
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* Hence no collision for the variable name jQx is expected.
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*/
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{"setenv jQx X; echo \"a)\" ${jQx} 'b)' '${jQx}' c) ${jQx}; setenv jQx",
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"a) X b) ${jQx} c) X"},
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/* Test shell variable assignments without substitutions */
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{"foo=bar echo baz", "baz"},
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/* Test handling of shell variables. */
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{"setenv jQx; for jQx in 1 2 3; do echo -n \"${jQx}, \"; done; echo;",
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"1, 2, 3, "},
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};
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static int lib_test_hush_echo(struct unit_test_state *uts)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(echo_data); ++i) {
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ut_silence_console(uts);
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console_record_reset_enable();
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ut_assertok(run_command(echo_data[i].cmd, 0));
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ut_unsilence_console(uts);
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console_record_readline(uts->actual_str,
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sizeof(uts->actual_str));
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ut_asserteq_str(echo_data[i].expected, uts->actual_str);
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ut_assertok(ut_check_console_end(uts));
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}
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return 0;
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}
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LIB_TEST(lib_test_hush_echo, 0);
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