Fix tuple handling (maxItems vs. additionalItems) (YousefED#397)

Author: joshkel

Diff for: test/programs/type-aliases-fixed-size-array/schema.json

@@ -1,15 +1,5 @@
 {
     "$schema": "http://json-schema.org/draft-07/schema#",
-    "additionalItems": {
-        "anyOf": [
-            {
-                "type": "string"
-            },
-            {
-                "type": "number"
-            }
-        ]
-    },
     "items": [
         {
             "type": "string"
@@ -18,6 +8,7 @@
             "type": "number"
         }
     ],
+    "maxItems": 2,
     "minItems": 2,
     "type": "array"
 }

Diff for: test/programs/type-aliases-tuple-of-variable-length/schema.json

@@ -12,18 +12,6 @@
             "type": "boolean"
         }
     ],
-    "additionalItems": {
-        "anyOf": [
-            {
-                "type": "string"
-            },
-            {
-                "type": "number"
-            },
-            {
-                "type": "boolean"
-            }
-        ]
-    },
+    "maxItems": 3,
     "minItems": 2
 }

Diff for: test/schema.test.ts

@@ -201,7 +201,7 @@ describe("schema", () => {
             aliasRef: true,
             topRef: false,
         });
-        // disabled beacuse of #80
+        // disabled because of #80
         // assertSchema("type-aliases-alias-ref-topref", "MyAlias", {
         //     useTypeAliasRef: true,
         //     useRootRef: true
@@ -210,7 +210,7 @@ describe("schema", () => {
             aliasRef: true,
             topRef: true,
         });
-        // disabled beacuse of #80
+        // disabled because of #80
         // assertSchema("type-aliases-recursive-alias-topref", "MyAlias", {
         //     useTypeAliasRef: true,
         //     useRootRef: true

Diff for: typescript-json-schema.ts

@@ -96,7 +96,7 @@ export interface Definition extends Omit<JSONSchema7, RedefinedFields> {
     defaultProperties?: string[];
     typeof?: "function";
 
-    // Fields that must be redifined because they make use of this definition itself
+    // Fields that must be redefined because they make use of this definition itself
     items?: DefinitionOrBoolean | DefinitionOrBoolean[];
     additionalItems?: DefinitionOrBoolean;
     contains?: JSONSchema7;
@@ -547,9 +547,7 @@ export class JsonSchemaGenerator {
                 definition.additionalItems = fixedTypes[fixedTypes.length - 1];
                 fixedTypes.splice(fixedTypes.length - 1, 1);
             } else {
-                definition.additionalItems = {
-                    anyOf: fixedTypes,
-                };
+                definition.maxItems = targetTupleType.fixedLength;
             }
         } else {
             const propertyTypeString = this.tc.typeToString(
@@ -722,7 +720,7 @@ export class JsonSchemaGenerator {
                         // node
                         const exp = (<any>initial).expression;
                         const text = (<any>exp).text;
-                        // if it is an expression with a text literal, chances are it is the enum convension:
+                        // if it is an expression with a text literal, chances are it is the enum convention:
                         // CASELABEL = 'literal' as any
                         if (text) {
                             enumValues.push(text);
@@ -1429,7 +1427,7 @@ export function buildGenerator(
         }
         return onlyIncludeFiles.indexOf(file.fileName) >= 0;
     }
-    // Use defaults unles otherwise specified
+    // Use defaults unless otherwise specified
     const settings = getDefaultArgs();
 
     for (const pref in args) {