test(td-tools): add a test for composed types in strings

Signed-off-by: reluc <[email protected]>

packages/td-tools/test/ThingModelHelperTest.ts

@@ -384,6 +384,40 @@ class ThingModelHelperTest {
         expect(partialTd).to.be.deep.equal(finalJSON);
     }
 
+    @test async "should correctly fill placeholders with composed types in strings"() {
+        const thing = {
+            "@context": ["http://www.w3.org/ns/td"],
+            "@type": "tm:ThingModel",
+            data: "data: {{ARRAY}}",
+            title: "Thermostate No. 4",
+            versionInfo: "version: {{VERSION_INFO}}",
+        } as unknown as ThingModel;
+        const map = {
+            ARRAY: [1, 2, 3],
+            VERSION_INFO: { instance: "xyz", model: "ABC" },
+        };
+        const finalJSON = {
+            "@context": ["http://www.w3.org/ns/td"],
+            "@type": "Thing",
+            title: "Thermostate No. 4",
+            data: "data: [1,2,3]",
+            versionInfo: 'version: {"instance":"xyz","model":"ABC"}',
+            links: [
+                {
+                    href: "./ThermostateNo.4.tm.jsonld",
+                    rel: "type",
+                    type: "application/tm+json",
+                },
+            ],
+        };
+        const options: CompositionOptions = {
+            map,
+            selfComposition: false,
+        };
+        const [partialTd] = await this.thingModelHelpers.getPartialTDs(thing, options);
+        expect(partialTd).to.be.deep.equal(finalJSON);
+    }
+
     @test async "should reject fill placeholders because of missing fields in map"() {
         const thing = {
             "@context": ["http://www.w3.org/ns/td"],