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-rw-r--r--tools/cheddar/src/tests.rs105
1 files changed, 105 insertions, 0 deletions
diff --git a/tools/cheddar/src/tests.rs b/tools/cheddar/src/tests.rs
new file mode 100644
index 000000000000..c82bba676746
--- /dev/null
+++ b/tools/cheddar/src/tests.rs
@@ -0,0 +1,105 @@
+use super::*;
+use std::io::BufReader;
+
+// Markdown rendering expectation, ignoring leading and trailing
+// whitespace in the input and output.
+fn expect_markdown(input: &str, expected: &str) {
+    let mut input_buf = BufReader::new(input.trim().as_bytes());
+    let mut out_buf: Vec<u8> = vec![];
+    format_markdown(&mut input_buf, &mut out_buf);
+
+    let out_string = String::from_utf8(out_buf).expect("output should be UTF8");
+    assert_eq!(out_string.trim(), expected.trim());
+}
+
+#[test]
+fn renders_simple_markdown() {
+    expect_markdown("hello", "<p>hello</p>\n");
+}
+
+#[test]
+fn renders_callouts() {
+    expect_markdown(
+        "TODO some task.",
+        r#"<p class="cheddar-callout cheddar-todo">
+TODO some task.
+</p>
+"#,
+    );
+
+    expect_markdown(
+        "WARNING: be careful",
+        r#"<p class="cheddar-callout cheddar-warning">
+WARNING: be careful
+</p>
+"#,
+    );
+
+    expect_markdown(
+        "TIP: note the thing",
+        r#"<p class="cheddar-callout cheddar-tip">
+TIP: note the thing
+</p>
+"#,
+    );
+}
+
+#[test]
+fn renders_code_snippets() {
+    expect_markdown(
+        r#"
+Code:
+```nix
+toString 42
+```
+"#,
+        r#"
+<p>Code:</p>
+<pre style="background-color:#f6f8fa;padding:16px;">
+<span style="color:#62a35c;">toString </span><span style="color:#0086b3;">42
+</span></pre>
+"#,
+    );
+}
+
+#[test]
+fn highlights_bug_link() {
+    expect_markdown(
+        "Please look at b/123.",
+        "<p>Please look at <a href=\"https://b.tvl.fyi/123\">b/123</a>.</p>",
+    );
+}
+
+#[test]
+fn highlights_cl_link() {
+    expect_markdown(
+        "Please look at cl/420.",
+        "<p>Please look at <a href=\"https://cl.tvl.fyi/420\">cl/420</a>.</p>",
+    );
+}
+
+#[test]
+fn highlights_r_link() {
+    expect_markdown(
+        "Fixed in r/3268.",
+        "<p>Fixed in <a href=\"https://code.tvl.fyi/commit/?id=refs/r/3268\">r/3268</a>.</p>",
+    );
+}
+
+#[test]
+fn highlights_multiple_shortlinks() {
+    expect_markdown(
+        "Please look at cl/420, b/123.",
+        "<p>Please look at <a href=\"https://cl.tvl.fyi/420\">cl/420</a>, <a href=\"https://b.tvl.fyi/123\">b/123</a>.</p>",
+    );
+
+    expect_markdown(
+        "b/213/cl/213 are different things",
+        "<p><a href=\"https://b.tvl.fyi/213\">b/213</a>/<a href=\"https://cl.tvl.fyi/213\">cl/213</a> are different things</p>",
+    );
+}
+
+#[test]
+fn ignores_invalid_shortlinks() {
+    expect_markdown("b/abc is not a real bug", "<p>b/abc is not a real bug</p>");
+}