Added tests for Query class

Author: grzesiek2010

db/src/test/java/org/odk/collect/db/sqlite/QueryTest.kt

@@ -0,0 +1,55 @@
+package org.odk.collect.db.sqlite
+
+import org.hamcrest.CoreMatchers.equalTo
+import org.hamcrest.MatcherAssert.assertThat
+import org.junit.Test
+
+class QueryTest {
+    @Test
+    fun `Eq query generates correct selection and arguments`() {
+        val query = Query.Eq("name", "John")
+
+        assertThat(query.selection, equalTo("name = ?"))
+        assertThat(query.selectionArgs, equalTo(arrayOf("John")))
+    }
+
+    @Test
+    fun `NotEq query generates correct selection and arguments`() {
+        val query = Query.NotEq("age", "30")
+
+        assertThat(query.selection, equalTo("age != ?"))
+        assertThat(query.selectionArgs, equalTo(arrayOf("30")))
+    }
+
+    @Test
+    fun `And query generates correct selection and arguments`() {
+        val queryA = Query.Eq("name", "John")
+        val queryB = Query.NotEq("age", "30")
+        val combinedQuery = Query.And(queryA, queryB)
+
+        assertThat(combinedQuery.selection, equalTo("(name = ? AND age != ?)"))
+        assertThat(combinedQuery.selectionArgs, equalTo(arrayOf("John", "30")))
+    }
+
+    @Test
+    fun `Or query generates correct selection and arguments`() {
+        val queryA = Query.Eq("city", "New York")
+        val queryB = Query.NotEq("country", "Canada")
+        val combinedQuery = Query.Or(queryA, queryB)
+
+        assertThat(combinedQuery.selection, equalTo("(city = ? OR country != ?)"))
+        assertThat(combinedQuery.selectionArgs, equalTo(arrayOf("New York", "Canada")))
+    }
+
+    @Test
+    fun `nested And and Or queries generates correct selection and arguments`() {
+        val queryA = Query.Eq("status", "active")
+        val queryB = Query.NotEq("role", "admin")
+        val queryC = Query.Eq("team", "engineering")
+
+        val combinedQuery = Query.And(Query.Or(queryA, queryB), queryC)
+
+        assertThat(combinedQuery.selection, equalTo("((status = ? OR role != ?) AND team = ?)"))
+        assertThat(combinedQuery.selectionArgs, equalTo(arrayOf("active", "admin", "engineering")))
+    }
+}