add a dependency on installing the python lib to running tests

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on:
       - master 
 
 jobs:
-  behaviour-test:
+  test:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
@@ -28,9 +28,12 @@ jobs:
           path: |
             ~/.cache/zig
             .zig-cache
-          key: osmium-${{hashFiles('build.zig.zon')}}          
+          key: osmium-${{hashFiles('build.zig.zon')}}    
 
-      - name: Run Tests
+      - name: Build Osmium
+        run: zig build
+
+      - name: Run Behaviour Tests
         run: zig build test --summary all
 
       - name: Save Cache

build.zig

@@ -74,6 +74,10 @@ pub fn build(b: *std.Build) !void {
             .dest_dir = .{ .override = .{ .custom = "python" } },
         });
         b.getInstallStep().dependOn(&libpython_install.step);
+
+        const test_step = b.step("test", "Test Osmium");
+        try cases.addCases(b, exe, test_step);
+        test_step.dependOn(&libpython_install.step);
     }
 
     // other steps
@@ -88,9 +92,6 @@ pub fn build(b: *std.Build) !void {
 
         const opcode_step = b.step("opcode", "Generate opcodes");
         generateOpCode(b, opcode_step);
-
-        const test_step = b.step("test", "Test Osmium");
-        try cases.addCases(b, exe, test_step);
     }
 }