2021-07-30 22:02:16 +02:00
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use assert_cmd::prelude::*;
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use pretty_assertions::assert_eq;
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use std::io::Write;
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use std::process::Command;
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use tempfile::NamedTempFile;
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2021-07-17 20:52:50 +02:00
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2021-07-30 22:02:16 +02:00
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type TestResult = Result<(), Box<dyn std::error::Error>>;
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#[cfg(test)]
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fn run_test(input: &str, expected: &str) -> TestResult {
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let mut file = NamedTempFile::new()?;
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let name = file.path();
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let mut cmd = Command::cargo_bin("engine-q")?;
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cmd.arg(name);
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writeln!(file, "{}", input)?;
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let output = cmd.output()?;
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assert!(output.status.success());
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let output = String::from_utf8_lossy(&output.stdout).to_string();
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assert_eq!(output.trim(), expected);
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Ok(())
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}
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#[cfg(test)]
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fn fail_test(input: &str, expected: &str) -> TestResult {
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let mut file = NamedTempFile::new()?;
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let name = file.path();
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let mut cmd = Command::cargo_bin("engine-q")?;
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cmd.arg(name);
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writeln!(file, "{}", input)?;
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let output = cmd.output()?;
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let output = String::from_utf8_lossy(&output.stderr).to_string();
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assert!(output.contains("Error:"));
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assert!(output.contains(expected));
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Ok(())
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}
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#[test]
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fn add_simple() -> TestResult {
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run_test("3 + 4", "7")
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}
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#[test]
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fn add_simple2() -> TestResult {
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run_test("3 + 4 + 9", "16")
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}
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#[test]
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fn broken_math() -> TestResult {
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fail_test("3 + ", "Incomplete")
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}
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