From d95bcba2d0509a3c12da118ba6f242ede9de1bbc Mon Sep 17 00:00:00 2001
From: Eunbin Son <thswlsqls@naver.com>
Date: Mon, 22 Jun 2026 11:30:45 +0900
Subject: [PATCH] Fix LongExemplarAssert hasFilteredAttributesSatisfyingExactly
 to enforce exact attribute matching

---
 CHANGELOG.md                                  |  8 ++++++++
 .../testing/assertj/LongExemplarAssert.java   |  2 +-
 .../testing/assertj/MetricAssertionsTest.java | 20 +++++++++++++++++++
 3 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c399e74acfa..5f30419121e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 ## Unreleased
 
+### SDK
+
+#### Testing
+
+* Fix `LongExemplarAssert.hasFilteredAttributesSatisfyingExactly` to reject extra filtered
+  attributes, matching `DoubleExemplarAssert`
+  ([#8518](https://github.com/open-telemetry/opentelemetry-java/pull/8518))
+
 ## Version 1.63.0 (2026-06-05)
 
 ### API
diff --git a/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/LongExemplarAssert.java b/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/LongExemplarAssert.java
index 9e93250544e..b8c304b451f 100644
--- a/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/LongExemplarAssert.java
+++ b/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/LongExemplarAssert.java
@@ -125,7 +125,7 @@ public LongExemplarAssert hasFilteredAttributesSatisfying(
    */
   public LongExemplarAssert hasFilteredAttributesSatisfyingExactly(
       AttributeAssertion... assertions) {
-    return hasFilteredAttributesSatisfying(Arrays.asList(assertions));
+    return hasFilteredAttributesSatisfyingExactly(Arrays.asList(assertions));
   }
 
   /**
diff --git a/sdk/testing/src/test/java/io/opentelemetry/sdk/testing/assertj/MetricAssertionsTest.java b/sdk/testing/src/test/java/io/opentelemetry/sdk/testing/assertj/MetricAssertionsTest.java
index 2cd6207f655..6312941599b 100644
--- a/sdk/testing/src/test/java/io/opentelemetry/sdk/testing/assertj/MetricAssertionsTest.java
+++ b/sdk/testing/src/test/java/io/opentelemetry/sdk/testing/assertj/MetricAssertionsTest.java
@@ -962,6 +962,26 @@ void longGaugeFailure() {
                                                     LENGTH,
                                                     val -> val.isCloseTo(1, offset(0.3))))))))
         .isInstanceOf(AssertionError.class);
+    // hasFilteredAttributesSatisfyingExactly must reject extra filtered attributes. The exemplar
+    // has nine filtered attributes but only one is asserted, so the exact assertion must fail.
+    assertThatThrownBy(
+            () ->
+                assertThat(LONG_GAUGE_METRIC)
+                    .hasLongGaugeSatisfying(
+                        gauge ->
+                            gauge.hasPointsSatisfying(
+                                point ->
+                                    point
+                                        .hasValue(Long.MAX_VALUE)
+                                        .hasExemplarsSatisfying(
+                                            exemplar -> exemplar.hasValue(2),
+                                            exemplar ->
+                                                exemplar
+                                                    .hasValue(1)
+                                                    .hasFilteredAttributesSatisfyingExactly(
+                                                        equalTo(BEAR, "mya"))),
+                                point -> point.hasValue(1))))
+        .isInstanceOf(AssertionError.class);
   }
 
   @Test