Get macro functional with tests

tests/cmd.rs

@@ -0,0 +1,79 @@
+use comlexr::cmd;
+use rstest::rstest;
+
+#[test]
+fn expression() {
+    let command = cmd!("echo", "test");
+
+    assert_eq!(format!("{command:?}"), r#""echo" "test""#.to_string());
+}
+
+#[rstest]
+#[case(false, false, r#""echo" "test""#)]
+#[case(true, false, r#""echo" "test" "single""#)]
+#[case(false, true, r#""echo" "test" "multi" "arg""#)]
+#[case(true, true, r#""echo" "test" "single" "multi" "arg""#)]
+fn if_statement(#[case] single: bool, #[case] multi: bool, #[case] expected: &str) {
+    let command = cmd!(
+        "echo",
+        "test",
+        if single => "single",
+        if multi => [
+            "multi",
+            "arg",
+        ],
+    );
+
+    assert_eq!(format!("{command:?}"), expected.to_string());
+}
+
+#[rstest]
+#[case(&[], r#""echo" "test""#)]
+#[case(&["1", "2"], r#""echo" "test" "1" "2""#)]
+fn for_iter(#[case] iter: &[&str], #[case] expected: &str) {
+    let command = cmd!(
+        "echo",
+        "test",
+        for iter,
+    );
+
+    assert_eq!(format!("{command:?}"), expected.to_string());
+}
+
+#[rstest]
+#[case(&[], &[], r#""echo" "test""#)]
+#[case(&["1", "2"], &[], r#""echo" "test" "1" "2""#)]
+#[case(&[], &["3", "4"], r#""echo" "test" "multi" "3" "multi" "4""#)]
+#[case(&["1", "2"], &["3", "4"], r#""echo" "test" "1" "2" "multi" "3" "multi" "4""#)]
+fn for_in(#[case] single_iter: &[&str], #[case] multi_iter: &[&str], #[case] expected: &str) {
+    let command = cmd!(
+        "echo",
+        "test",
+        for arg in single_iter => arg,
+        for arg in multi_iter => [
+            "multi",
+            arg,
+        ],
+    );
+
+    assert_eq!(format!("{command:?}"), expected.to_string());
+}
+
+#[rstest]
+#[case(None, None, r#""echo" "test""#)]
+#[case(Some("arg"), None, r#""echo" "test" "arg""#)]
+#[case(None, Some("arg"), r#""echo" "test" "multi" "arg""#)]
+#[case(Some("1"), Some("2"), r#""echo" "test" "1" "multi" "2""#)]
+fn if_let(#[case] single: Option<&str>, #[case] multi: Option<&str>, #[case] expected: &str) {
+    let command = cmd!(
+        "echo",
+        "test",
+        if let Some(arg) = single => arg,
+        if let Some(arg) = multi => [
+            "multi",
+            arg,
+        ],
+    );
+
+    assert_eq!(format!("{command:?}"), expected.to_string());
+}