clean up ASSERT_ARRAY_EQUAL output

- align columns
- only print '!=' when array elements differ, print '==' otherwise

impulsegen.c

@@ -102,7 +102,7 @@ test void test_gen_impulsetab()
 	};
 	int32_t *pulsetab = gen_impulsetab(w_shift, n_shift, cutoff);
 
-	ASSERT_ARRAY_EQUAL("%d", reference, pulsetab);
+	ASSERT_ARRAY_EQUAL("%8d", reference, pulsetab);
 }
 TEST(test_gen_impulsetab);
 TEST_EOF;

test.h

@@ -21,6 +21,7 @@
 #define ASSERT_ARRAY_EQUAL(fmt, a, b) do { \
 	int pass = 1; \
 	int i; \
+	char *cmp; \
 	for (i=0; i<sizeof(a)/sizeof(*(a)); i++) { \
 		if ((a)[i] == (b)[i]) \
 			continue; \
@@ -31,9 +32,11 @@
 		return; \
 	fprintf(stderr, "FAIL\nTest failed at %s:%d\n", __FILE__, __LINE__); \
 	for (i=0; i<sizeof(a)/sizeof(*(a)); i++) { \
-		/* if ((a)[i] == (b)[i]) \
-			continue; */ \
-		fprintf(stderr, "%d: "fmt" != "fmt"\n", i, (a)[i], (b)[i]); \
+		if ((a)[i] == (b)[i]) \
+			cmp = "=="; \
+		else \
+			cmp = "!="; \
+		fprintf(stderr, "%4d: "fmt" %s "fmt"\n", i, (a)[i], cmp, (b)[i]); \
 	} \
 	exit(1); \
 } while(0)

util.c

@@ -137,7 +137,7 @@ test void test_spack()
 
 	int l = spack(got, "{ }<bwdq{1}>bwdq", b, w, d, q, b, w, d, q);
 
-	ASSERT_ARRAY_EQUAL("%d", want, got);
+	ASSERT_ARRAY_EQUAL("%2d", want, got);
 	ASSERT_EQUAL("%d", (int)sizeof(want), l);
 }
 TEST(test_spack);