#3461 show result in error message

objectionary · Nov 24, 2024 · bf5b9d1 · bf5b9d1
1 parent 1e6f5da
commit bf5b9d1
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Showing 2 changed files with 7 additions and 2 deletions.
diff --git a/eo-runtime/src/main/java/org/eolang/Expect.java b/eo-runtime/src/main/java/org/eolang/Expect.java
@@ -117,7 +117,9 @@ public Expect<T> must(final Function<T, Boolean> fun) {
             () -> {
                 final T ret = this.sup.get();
                 if (!fun.apply(ret)) {
-                    throw new ExFailure(this.subject);
+                    throw new ExFailure(
+                        String.format("%s (%s)", this.subject, ret)
+                    );
                 }
                 return ret;
             }

diff --git a/eo-runtime/src/test/java/EOorg/EOeolang/EObytesEOsliceTest.java b/eo-runtime/src/test/java/EOorg/EOeolang/EObytesEOsliceTest.java
@@ -96,7 +96,10 @@ void takesWrongSlice() {
         MatcherAssert.assertThat(
             "error message is correct",
             baos.toString(),
-            Matchers.containsString("the 'len' attribute must be a positive integer")
+            Matchers.allOf(
+                Matchers.containsString("the 'len' attribute must be a positive integer"),
+                Matchers.containsString("the 'len' attribute (-5)")
+            )
         );
     }