From 7f091478ec89550483b3cd30b4eb30ffa5e12a62 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 13 Apr 2023 10:32:38 -0700
Subject: Add inherit interface test. (#2800)

Fixes #2573.

Co-authored-by: Yong He <yhe@nvidia.com>
---
 tests/bugs/inherit-interface.slang              | 38 +++++++++++++++++++++++++
 tests/bugs/inherit-interface.slang.expected.txt |  5 ++++
 2 files changed, 43 insertions(+)
 create mode 100644 tests/bugs/inherit-interface.slang
 create mode 100644 tests/bugs/inherit-interface.slang.expected.txt

diff --git a/tests/bugs/inherit-interface.slang b/tests/bugs/inherit-interface.slang
new file mode 100644
index 000000000..3b348d12e
--- /dev/null
+++ b/tests/bugs/inherit-interface.slang
@@ -0,0 +1,38 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+interface IA
+{
+    int doThing(int a);
+};
+
+interface IB : IA
+{
+    int anotherThing(int a);
+};
+
+struct Struct : IB
+{
+    int doThing(int a) { return a + 1; }
+    int anotherThing(int a) { return a * a; }
+};
+
+int doThing<B : IB>(B b, int c)
+{
+    return b.doThing(c) + b.anotherThing(c);
+}
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+	uint tid = dispatchThreadID.x;
+
+    Struct s;
+    int v = doThing(s, int(tid));
+    
+	float inVal = float(tid + v);
+
+	outputBuffer[tid] = inVal;
+}
\ No newline at end of file
diff --git a/tests/bugs/inherit-interface.slang.expected.txt b/tests/bugs/inherit-interface.slang.expected.txt
new file mode 100644
index 000000000..fe70e7eb6
--- /dev/null
+++ b/tests/bugs/inherit-interface.slang.expected.txt
@@ -0,0 +1,5 @@
+type: float
+1.000000
+4.000000
+9.000000
+16.000000
-- 
cgit v1.2.3