test: add FormProgramService tests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

FabWorks.Tests/FabWorks.Tests.csproj

@@ -22,6 +22,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\FabWorks.Core\FabWorks.Core.csproj" />
+    <ProjectReference Include="..\FabWorks.Api\FabWorks.Api.csproj" />
   </ItemGroup>
 
   <ItemGroup>

FabWorks.Tests/FormProgramServiceTests.cs

@@ -0,0 +1,53 @@
+using FabWorks.Api.Services;
+using Xunit;
+
+namespace FabWorks.Tests
+{
+    public class FormProgramServiceTests
+    {
+        [Fact]
+        public void ParseFromFile_SamplePgm_PopulatesMaterialType()
+        {
+            var service = new FormProgramService();
+            var fp = service.ParseFromFile("TestData/sample.pgm");
+
+            // ProgName is empty in the sample file, so verify MaterialType instead
+            Assert.False(string.IsNullOrEmpty(fp.MaterialType));
+        }
+
+        [Fact]
+        public void ParseFromFile_SamplePgm_PopulatesThickness()
+        {
+            var service = new FormProgramService();
+            var fp = service.ParseFromFile("TestData/sample.pgm");
+            Assert.NotNull(fp.Thickness);
+            Assert.True(fp.Thickness > 0);
+        }
+
+        [Fact]
+        public void ParseFromFile_SamplePgm_PopulatesBendCount()
+        {
+            var service = new FormProgramService();
+            var fp = service.ParseFromFile("TestData/sample.pgm");
+            Assert.True(fp.BendCount > 0);
+        }
+
+        [Fact]
+        public void ParseFromFile_SamplePgm_PopulatesToolNames()
+        {
+            var service = new FormProgramService();
+            var fp = service.ParseFromFile("TestData/sample.pgm");
+            Assert.False(string.IsNullOrEmpty(fp.UpperToolNames));
+            Assert.False(string.IsNullOrEmpty(fp.LowerToolNames));
+        }
+
+        [Fact]
+        public void ParseFromFile_SamplePgm_ComputesContentHash()
+        {
+            var service = new FormProgramService();
+            var fp = service.ParseFromFile("TestData/sample.pgm");
+            Assert.NotNull(fp.ContentHash);
+            Assert.Equal(64, fp.ContentHash.Length); // SHA256 hex = 64 chars
+        }
+    }
+}