3 files changed, 17 insertions, 0 deletions
diff --git a/tests/extensions/test-about-render.lua b/tests/extensions/test-about-render.lua
index 95e95bb..45cc5b3 100644
--- a/tests/extensions/test-about-render.lua
+++ b/tests/extensions/test-about-render.lua
@@ -24,6 +24,13 @@ end
 
 h.load(script)
 
+-- A missing lpeg is written to the error log as the script loads.
+if mode == "nolpeg" then
+	h.contains("a missing lpeg is named in the error log", h.error_log(), "Unable to load lpeg")
+elseif has_lpeg then
+	h.equals("with lpeg the error log stays empty", h.error_log(), "")
+end
+
 local function render(filename, text)
 	return h.run({ filename }, { text })
 end
diff --git a/tests/extensions/test-email-avatar.lua b/tests/extensions/test-email-avatar.lua
index 3f14eac..aa021e2 100644
--- a/tests/extensions/test-email-avatar.lua
+++ b/tests/extensions/test-email-avatar.lua
@@ -26,6 +26,12 @@ end
 
 h.load(script)
 
+if mode == "missing" then
+	h.contains("a missing luaossl is named in the error log", h.error_log(), "Unable to load openssl.digest")
+else
+	h.equals("with luaossl the error log stays empty", h.error_log(), "")
+end
+
 local function render(email, name)
 	return h.run({ email, "commit" }, { name })
 end
diff --git a/tests/extensions/test-syntax-highlight.lua b/tests/extensions/test-syntax-highlight.lua
index a0debc6..8acbf91 100644
--- a/tests/extensions/test-syntax-highlight.lua
+++ b/tests/extensions/test-syntax-highlight.lua
@@ -23,9 +23,12 @@ if mode == "nolexers" then
 	local out, ret = render("hello.fake", "if 42")
 	h.equals("without lexers source is served escaped", out, "if 42")
 	h.equals("close answers zero", ret, 0)
+	h.contains("and the error log says the lexers would not load", h.error_log(),
+		"Unable to load the Scintillua lexers")
 
 	out = render("hello.fake", "a <b> & c")
 	h.equals("the fallback escapes markup", out, "a &lt;b&gt; &amp; c")
+	h.equals("and the error log hears of it only once", h.error_log(), "")
 
 	-- Large output leaves in slices, and a byte lost at a boundary would
 	-- put the line numbers beside it out of step, so the whole escaped
@@ -48,6 +51,7 @@ if mode == "nolexers" then
 end
 
 local out, ret = render("hello.fake", "if 42 'hi' & zz")
+h.equals("loaded lexers leave the error log empty", h.error_log(), "")
 h.contains("keywords are wrapped in their class", out, "<span class='hl-keyword'>if</span>")
 h.contains("numbers are wrapped in their class", out, "<span class='hl-number'>42</span>")
 h.contains("a dotted tag maps by its first component", out, "<span class='hl-string'>'hi'</span>")
-rw-r--r--	tests/extensions/test-about-render.lua	7
-rw-r--r--	tests/extensions/test-email-avatar.lua	6
-rw-r--r--	tests/extensions/test-syntax-highlight.lua	4