package org.hamcrest.text;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;

import java.util.Arrays;

public class StringContainsInOrder extends TypeSafeMatcher<String> {
    
private final Iterable<String> substrings;

    
public StringContainsInOrder(Iterable<String> substrings) {
        
this.substrings = substrings;
    
}

    
@Override
    
public boolean matchesSafely(String s) {
        
int fromIndex = 0;
        

        
for (String substring : substrings) {
            
fromIndex = s.indexOf(substring, fromIndex);
            
if (fromIndex == -1) {
                
return false;
            
}
            
fromIndex++;
        
}
        

        
return true;
    
}
    

    
@Override
    
public void describeMismatchSafely(String item, Description mismatchDescription) {
        
mismatchDescription.appendText("was \"").appendText(item).appendText("\"");
    
}
    

    
@Override
    
public void describeTo(Description description) {
        
description.appendText("a string containing ")
                   
.appendValueList("", ", ", "", substrings)
                   
.appendText(" in order");
    
}
    

    
/**
     
* Creates a matcher of {@link String} that matches when the examined string contains all of
     
* the specified substrings, considering the order of their appearance.
     
* For example:
     
* <pre>assertThat("myfoobarbaz", stringContainsInOrder(Arrays.asList("bar", "foo")))</pre>
     
* fails as "foo" occurs before "bar" in the string "myfoobarbaz"
     
*
 

     
* @param substrings
     
*the substrings that must be contained within matching strings
     
*/

    
public static Matcher<String> stringContainsInOrder(Iterable<String> substrings) {
        
return new StringContainsInOrder(substrings);
    
}

    
/**
     
* Creates a matcher of {@link String} that matches when the examined string contains all of
     
* the specified substrings, considering the order of their appearance.
     
* For example:
     
* <pre>assertThat("myfoobarbaz", stringContainsInOrder("bar", "foo"))</pre>
     
* fails as "foo" occurs before "bar" in the string "myfoobarbaz"
     
*
     
* @param substrings
     
*the substrings that must be contained within matching strings
     
*/

    
public static Matcher<String> stringContainsInOrder(String... substrings) {
        
return new StringContainsInOrder(Arrays.asList(substrings));
    
}
}