Add fonts, autotable, autotable examples

go/bundler/tailwind_test.go

@@ -215,3 +215,61 @@ func TestExtractCandidatesRegexLiterals(t *testing.T) {
 		}
 	}
 }
+
+// The preflight is written against Tailwind's compile-time CSS functions, e.g.
+// `font-family: --theme(--default-font-family, …)`. If those are not resolved, they
+// reach the browser verbatim; the browser cannot parse `--theme(…)` and DROPS THE
+// WHOLE DECLARATION. The symptom is subtle and global: every page silently loses its
+// font-family and falls back to the browser default, and no @theme override of
+// --font-sans can ever take effect. That shipped for a while, so pin it.
+func TestPreflightResolvesThemeFunctions(t *testing.T) {
+	css, _, err := twCompile(`@import "tailwindcss";`, ".", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	flat := strings.Join(strings.Fields(css), " ")
+	if strings.Contains(css, "--theme(") {
+		t.Error("the compiled CSS still contains an unresolved --theme(…); the browser will drop those declarations")
+	}
+	if !strings.Contains(flat, "font-family: var(--default-font-family)") {
+		t.Error("preflight did not resolve html's font-family to a var()")
+	}
+}
+
+// And the whole point of resolving it: an app's @theme override of --font-sans must
+// actually reach the page.
+func TestThemeFontOverrideReachesHTML(t *testing.T) {
+	css, _, err := twCompile(`
+@import "tailwindcss";
+
+@font-face {
+  font-family: "Lora";
+  src: url("/fonts/lora.woff2") format("woff2");
+}
+
+@theme {
+  --font-sans: "Lora", serif;
+}
+`, ".", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// The chain the browser walks: html -> --default-font-family -> --font-sans.
+	flat := strings.Join(strings.Fields(css), " ")
+	for _, want := range []string{
+		"font-family: var(--default-font-family)",
+		"--default-font-family: var(--font-sans)",
+		`--font-sans: "Lora", serif`,
+	} {
+		if !strings.Contains(flat, want) {
+			t.Errorf("missing %q — the font override does not reach the page", want)
+		}
+	}
+	// A vendored face must survive the build; dropping it would leave the family
+	// declared but never loaded.
+	if !strings.Contains(css, "@font-face") || !strings.Contains(css, "lora.woff2") {
+		t.Error("@font-face was dropped from the output")
+	}
+}