diff -r 4a80c6053a66 -r 4c8606eb60c1 test/harness/testcase.c
--- a/test/harness/testcase.c	Mon Jan 30 23:32:47 2012 +0000
+++ b/test/harness/testcase.c	Sun May 26 01:46:33 2013 +0100
@@ -239,6 +239,218 @@
 }
 
 /*
+ * Parse a warning of the form:
+ *	[blank line]
+ *	<echoed line> (ignored)
+ *	"    Line " <number> [" column " <number>] " - " <text> "\n"
+ * If not specified, the column is returned as 0.
+ * Returns: the number of bytes parsed, or -1 on error.
+ */
+static ssize_t testcase_parse_warning(Testcase *testcase,const char *output,
+  guint *line,guint *column,char **text)
+{
+    ssize_t offset=0;
+    guint64 tmp;
+    char *s,*endp;
+    if (output[offset]!='\n')
+    {
+	g_print("%s: FAIL\n",testcase->basename);
+	g_print("Unexpected output from bookloupe:\n");
+	print_unexpected(output,offset);
+	return -1;
+    }
+    offset++;
+    s=strchr(output+offset,'\n');
+    if (!s)
+    {
+	g_print("%s: FAIL\n",testcase->basename);
+	g_print("Missing new-line in output from bookloupe:\n");
+	print_unexpected(output,offset);
+	return -1;
+    }
+    offset=s-output+1;
+    if (!g_str_has_prefix(output+offset,"    Line "))
+    {
+	g_print("%s: FAIL\n",testcase->basename);
+	g_print("Unexpected output from bookloupe:\n");
+	offset+=common_prefix_length(output+offset,"    Line ");
+	print_unexpected(output,offset);
+	return -1;
+    }
+    offset+=9;
+    tmp=g_ascii_strtoull(output+offset,&endp,10);
+    if (tmp<1 || tmp>G_MAXUINT || tmp==G_MAXUINT64)
+    {
+	g_print("%s: FAIL\n",testcase->basename);
+	g_print("Unexpected output from bookloupe:\n");
+	print_unexpected(output,offset);
+	return -1;
+    }
+    *line=tmp;
+    offset=endp-output;
+    if (g_str_has_prefix(output+offset," column "))
+    {
+	offset+=8;
+	tmp=g_ascii_strtoull(output+offset,&endp,10);
+	if (tmp<1 || tmp>G_MAXUINT || tmp==G_MAXUINT64)
+	{
+	    g_print("%s: FAIL\n",testcase->basename);
+	    g_print("Unexpected output from bookloupe:\n");
+	    print_unexpected(output,offset);
+	    return -1;
+	}
+	*column=tmp;
+	offset=endp-output;
+    }
+    else
+	*column=0;
+    if (!g_str_has_prefix(output+offset," - "))
+    {
+	g_print("%s: FAIL\n",testcase->basename);
+	g_print("Unexpected output from bookloupe:\n");
+	offset+=common_prefix_length(output+offset," - ");
+	print_unexpected(output,offset);
+	return -1;
+    }
+    offset+=3;
+    s=strchr(output+offset,'\n');
+    if (!s)
+    {
+	g_print("%s: FAIL\n",testcase->basename);
+	g_print("Missing new-line in output from bookloupe:\n");
+	print_unexpected(output,offset);
+	return -1;
+    }
+    *text=g_strndup(output+offset,s-(output+offset));
+    return s-output+1;
+}
+
+/*
+ * Check the warnings produced by bookloupe against either the
+ * unstructured testcase->expected or the structured testcase->warnings
+ * as appropriate.
+ */
+static gboolean testcase_check_warnings(Testcase *testcase,const char *output,
+  char **xfail)
+{
+    gboolean r=TRUE;
+    size_t offset;
+    ssize_t off;
+    int i,count_false_positive,count_false_negative;
+    int total_false_positive,total_false_negative;
+    char *text;
+    guint *counts,line,column;
+    GSList *link,*link2;
+    TestcaseWarning *warning;
+    TestcaseLocation *location;
+    *xfail=NULL;
+    if (testcase->expected)
+    {
+	if (strcmp(output,testcase->expected))
+	{
+	    g_print("%s: FAIL\n",testcase->basename);
+	    offset=common_prefix_length(output,testcase->expected);
+	    if (!offset && !output[offset])
+		g_print("Unexpected zero warnings from bookloupe.\n");
+	    else
+	    {
+		g_print("Unexpected output from bookloupe:\n");
+		print_unexpected(output,offset);
+	    }
+	    return FALSE;
+	}
+	return TRUE;
+    }
+    counts=g_new0(guint,g_slist_length(testcase->warnings));
+    for(offset=0;output[offset];)
+    {
+	off=testcase_parse_warning(testcase,output+offset,&line,&column,&text);
+	if (off<0)
+	{
+	    r=FALSE;
+	    break;
+	}
+	offset+=off;
+	for(link=testcase->warnings,i=0;link;link=link->next,i++)
+	{
+	    warning=link->data;
+	    if (strcmp(warning->text,text))
+		continue;
+	    for(link2=warning->locations;link2;link2=link2->next)
+	    {
+		location=link2->data;
+		if (location->line!=line || location->column!=column)
+		    continue;
+		counts[i]++;
+		break;
+	    }
+	    if (link2)
+		break;
+	}
+	if (!link)
+	{
+	    g_print("%s: FAIL\n",testcase->basename);
+	    g_print("Unexpected warning from bookloupe:\n");
+	    if (column)
+		g_print("    Line %u column %u - %s\n",line,column,text);
+	    else
+		g_print("    Line %u - %s\n",line,text);
+	    r=FALSE;
+	    g_free(text);
+	    break;
+	}
+	g_free(text);
+    }
+    count_false_positive=total_false_positive=0;
+    count_false_negative=total_false_negative=0;
+    for(link=testcase->warnings,i=0;r && link;link=link->next,i++)
+    {
+	warning=link->data;
+	if (!counts[i] && warning->is_real && !warning->xfail)
+	{
+	    location=warning->locations->data;
+	    g_print("%s: FAIL\n",testcase->basename);
+	    g_print("Missing warning from bookloupe:\n");
+	    if (location->column)
+		g_print("    Line %u column %u - %s\n",location->line,
+		  location->column,warning->text);
+	    else
+		g_print("    Line %u - %s\n",location->line,warning->text);
+	    r=FALSE;
+	    break;
+	}
+	else if (warning->xfail)
+	{
+	    if (warning->is_real)
+	    {
+		total_false_negative++;
+		if (!counts[i])
+		    count_false_negative++;
+	    }
+	    else if (!warning->is_real)
+	    {
+		total_false_positive++;
+		if (counts[i])
+		    count_false_positive++;
+	    }
+	}
+    }
+    g_free(counts);
+    if (count_false_positive && count_false_negative)
+	*xfail=g_strdup_printf(
+	  "with %d of %d false positives and %d of %d false negatives",
+	  count_false_positive,total_false_positive,
+	  count_false_negative,total_false_negative);
+    else if (count_false_positive)
+	*xfail=g_strdup_printf("with %d of %d false positives",
+	  count_false_positive,total_false_positive);
+    else if (count_false_negative)
+	*xfail=g_strdup_printf("with %d of %d false negatives",
+	  count_false_negative,total_false_negative);
+    return r;
+}
+
+/*
  * Run a testcase, returning FALSE on fail or error and
  * TRUE on pass or expected-fail.
  * Suitable message(s) will be printed in all cases.
@@ -247,8 +459,8 @@
 {
     gboolean r;
     size_t pos,offset;
-    GString *header,*expected;
-    char *output,*filename,*s;
+    GString *header;
+    char *output,*filename,*s,*xfail=NULL;
     GError *error=NULL;
     if (!testcase_create_input_files(testcase,&error))
     {
@@ -257,7 +469,7 @@
 	g_error_free(error);
 	return FALSE;
     }
-    if (testcase->expected)
+    if (testcase->expected || testcase->warnings)
 	r=testcase_spawn_bookloupe(testcase,&output,&error);
     else
     {
@@ -280,17 +492,16 @@
 	g_error_free(error);
 	return FALSE;
     }
-    if (testcase->expected)
+    if (testcase->expected || testcase->warnings)
     {
 	header=g_string_new("\n\nFile: ");
 	g_string_append(header,filename);
 	g_string_append(header,"\n");
-	expected=g_string_new(testcase->expected);
 	if (!g_str_has_prefix(output,header->str))
 	{
 	    g_print("%s: FAIL\n",testcase->basename);
+	    g_print("Unexpected header from bookloupe:\n");
 	    offset=common_prefix_length(output,header->str);
-	    g_print("Unexpected header from bookloupe:\n");
 	    print_unexpected(output,offset);
 	    r=FALSE;
 	}
@@ -304,36 +515,39 @@
 	    else
 	    {
 		g_print("%s: FAIL\n",testcase->basename);
-		offset=common_prefix_length(output,header->str);
 		g_print("Unterminated summary from bookloupe:\n%s\n",
 		  output+pos);
 		r=FALSE;
 	    }
 	}
-	if (r && strcmp(output+pos,expected->str))
-	{
-	    g_print("%s: FAIL\n",testcase->basename);
-	    offset=common_prefix_length(output+pos,expected->str);
-	    if (!offset && !output[pos+offset])
-		g_print("Unexpected zero warnings from bookloupe.\n");
-	    else
-	    {
-		g_print("Unexpected output from bookloupe:\n");
-		print_unexpected(output+pos,offset);
-	    }
-	    r=FALSE;
-	}
 	g_string_free(header,TRUE);
-	g_string_free(expected,TRUE);
+	r=testcase_check_warnings(testcase,output+pos,&xfail);
     }
     g_free(filename);
     g_free(output);
     if (r)
-	g_print("%s: PASS\n",testcase->basename);
+    {
+	if (xfail)
+	    g_print("%s: PASS (%s)\n",testcase->basename,xfail);
+	else
+	    g_print("%s: PASS\n",testcase->basename);
+    }
+    g_free(xfail);
     return r;
 }
 
 /*
+ * Free a testcase warning.
+ */
+void testcase_warning_free(TestcaseWarning *warning)
+{
+    g_slist_foreach(warning->locations,(GFunc)g_free,NULL);
+    g_slist_free(warning->locations);
+    g_free(warning->text);
+    g_free(warning);
+}
+
+/*
  * Free a testcase.
  */
 void testcase_free(Testcase *testcase)
@@ -342,6 +556,8 @@
     g_slist_foreach(testcase->inputs,(GFunc)testcase_input_free,NULL);
     g_slist_free(testcase->inputs);
     g_free(testcase->expected);
+    g_slist_foreach(testcase->warnings,(GFunc)testcase_warning_free,NULL);
+    g_slist_free(testcase->warnings);
     g_free(testcase->encoding);
     g_strfreev(testcase->options);
     g_free(testcase);