Add version announcement requirement. Version must be set explicitly …

…either using `processingMode` API option set to "json-ld-1.1", or `"@Version": 1.1` in the first encountered JSON Object context, otherwise processing mode set implicitly to "json-ld-1.0". Added checks with expected errors in context processing if new features used in context with the wrong processing mode. Also adds compact/expand tests to check for proper error reporting.

Fixes #446.

error-manifest.jsonld

@@ -382,6 +382,53 @@
       "context": "error-n007-context.jsonld",
       "expect": "invalid @nest value",
       "option": {"processingMode": "json-ld-1.1"}
+    }, {
+      "@id": "#tp001",
+      "@type": ["jld:NegativeEvaluationTest", "jld:ExpandTest"],
+      "name": "Processing mode is implicitly json-ld-1.0",
+      "purpose": "If not specified using processingMode, processing mode is taken as json-ld-1.0",
+      "input": "error-p001-in.jsonld",
+      "expect": "invalid container mapping"
+    }, {
+      "@id": "#tp002",
+      "@type": ["jld:NegativeEvaluationTest", "jld:ExpandTest"],
+      "name": "processingMode json-ld-1.0 conflicts with @version: 1.1",
+      "purpose": "If not specified using processingMode, processing mode is taken as json-ld-1.0",
+      "input": "error-p002-in.jsonld",
+      "expect": "processing mode conflict",
+      "option": {"processingMode": "json-ld-1.0"}
+    }, {
+      "@id": "#tp003",
+      "@type": ["jld:NegativeEvaluationTest", "jld:ExpandTest"],
+      "name": "@version must be 1.1",
+      "purpose": "If @version is specified, it must be 1.1",
+      "input": "error-p003-in.jsonld",
+      "expect": "invalid @version value"
+    }, {
+      "@id": "#tp004",
+      "@type": ["jld:NegativeEvaluationTest", "jld:CompactTest"],
+      "name": "Processing mode is implicitly json-ld-1.0",
+      "purpose": "If not specified using processingMode, processing mode is taken as json-ld-1.0",
+      "input": "error-p004-in.jsonld",
+      "context": "error-p004-context.jsonld",
+      "expect": "invalid container mapping"
+    }, {
+      "@id": "#tp005",
+      "@type": ["jld:NegativeEvaluationTest", "jld:CompactTest"],
+      "name": "processingMode json-ld-1.0 conflicts with @version: 1.1",
+      "purpose": "If not specified using processingMode, processing mode is taken as json-ld-1.0",
+      "input": "error-p005-in.jsonld",
+      "context": "error-p005-context.jsonld",
+      "expect": "processing mode conflict",
+      "option": {"processingMode": "json-ld-1.0"}
+    }, {
+      "@id": "#tp006",
+      "@type": ["jld:NegativeEvaluationTest", "jld:CompactTest"],
+      "name": "@version must be 1.1",
+      "purpose": "If @version is specified, it must be 1.1",
+      "input": "error-p006-in.jsonld",
+      "context": "error-p006-context.jsonld",
+      "expect": "invalid @version value"
     }
   ]
 }

error-p001-in.jsonld

@@ -0,0 +1,10 @@
+{
+  "@context": {
+    "@vocab": "http://example/",
+    "idmap": {"@container": "@id"}
+  },
+  "idmap": {
+    "http://example.org/foo": {"label": "Object with @id <foo>"},
+    "_:bar": {"label": "Object with @id _:bar"}
+  }
+}

error-p002-in.jsonld

@@ -0,0 +1,5 @@
+{
+  "@context": {
+    "@version": 1.1
+  }
+}

error-p003-in.jsonld

@@ -0,0 +1,5 @@
+{
+  "@context": {
+    "@version": 1.0
+  }
+}

error-p004-context.jsonld

@@ -0,0 +1,7 @@
+{
+  "@context": {
+    "@vocab": "http://example/",
+    "ex": "http://example.org/",
+    "idmap": {"@container": "@id"}
+  }
+}

error-p004-in.jsonld

@@ -0,0 +1,5 @@
+[{
+  "http://example/idmap": [
+    {"http://example/label": [{"@value": "Object with @id <foo>"}], "@id": "http://example.org/foo"}
+  ]
+}]

error-p005-context.jsonld

@@ -0,0 +1,5 @@
+{
+  "@context": {
+    "@version": 1.1
+  }
+}

error-p005-in.jsonld

@@ -0,0 +1 @@
+{}

error-p006-context.jsonld

@@ -0,0 +1,5 @@
+{
+  "@context": {
+    "@version": 1.0
+  }
+}

error-p006-in.jsonld

@@ -0,0 +1 @@
+{}