Added assertions to most tests

tests/programs/shift.q

@@ -1,57 +1,15 @@
-import sys
-
 main() {
-	if 0 << 0 != 0 {
-		sys.exit(1)
-	}
-
-	if 0 >> 0 != 0 {
-		sys.exit(2)
-	}
-
-	if 1 << 0 != 1 {
-		sys.exit(3)
-	}
-
-	if 1 >> 0 != 1 {
-		sys.exit(4)
-	}
-
-	if 1 >> 1 != 0 {
-		sys.exit(5)
-	}
-
-	if 1 << 1 != 2 {
-		sys.exit(6)
-	}
-
-	if 1 << 2 != 4 {
-		sys.exit(7)
-	}
-
-	if 1 << 3 != 8 {
-		sys.exit(8)
-	}
-
-	if 1 << 4 != 16 {
-		sys.exit(9)
-	}
-
-	if 16 >> 1 != 8 {
-		sys.exit(10)
-	}
-
-	if 16 >> 2 != 4 {
-		sys.exit(11)
-	}
-
-	if 16 >> 3 != 2 {
-		sys.exit(12)
-	}
-
-	if 16 >> 4 != 1 {
-		sys.exit(13)
-	}
-
-	sys.exit(0)
+	assert 0 << 0 == 0
+	assert 0 >> 0 == 0
+	assert 1 << 0 == 1
+	assert 1 >> 0 == 1
+	assert 1 >> 1 == 0
+	assert 1 << 1 == 2
+	assert 1 << 2 == 4
+	assert 1 << 3 == 8
+	assert 1 << 4 == 16
+	assert 16 >> 1 == 8
+	assert 16 >> 2 == 4
+	assert 16 >> 3 == 2
+	assert 16 >> 4 == 1
 }